Refining-engine.



' No. 704,693. Patentgd July |`5, i902.

E.`cHuR cH|LL,`1n. s. H. A. HALL.

REFINING ENGINE.

1' 'on med Mar. 1'1, 1902) (nu Model.) 2 sheetssheet :l i E 'Irun-algu:n :Il 2 fn N nu y i l o N n b3 lli l2 \\\\lz1ll/// Ffya.

l l 4 l. Il 'HIM "h Patented .luly i5, |902. E. CHURCHILL, Jn. & H. A.HALL.

BEFINING ENGINE.

(Application led Mar. 17, 1902.)

l 2 Sheets-Sheet 2.

(No Model.)

Unifrnn STATES PATENT rricn.

EDVIN CHURCHILL, JR., AND HUGH A. HALL, OF LAVRENCE, MASSA- CIIUSETTS.

REFlNlNG-ENGINE.

SPECIFICATION forming part of Letters Patent No. 704,693, dated July 15,1902. Application filed March 17, 1902. SerialNo. 98,559. (No morir-.IJ

T0 all mirent t may concern:

Be it known that we, EDWIN CHURCHILL, Jr., and HUGH A. HALL, ofLawrence, county of Essex,and State of Massachusetts, have invented anImprovement in Refining-Engines, of which the following description, inconnection with the accompanying drawings, is a specification, likecharacters on the drawings representing like parts.

This invention relates to that class of pulprefining machines which aregenerally known as Jordan engines.

Prior to our invention the driving-pulley for the shaft of the plug hasgenerally been arranged on the shaft between two fixed journal-bearings,the standards or supports of said bearings extending down to a commonbase,upon which the main part of the machine is also supported. It hasalso been customary to provide a sliding connection between thedriving-shaft and the pulley, so that the shaft can be movedlongitudinally in order to move the plug up closer to the casing whenthe blades have become shortened by wear, the pulley being held fromlateral movement by the adjacent j ournal-boxes. This construction andarrangement is open to various objections, the principal of which are asfollows: It is very difcult to keep the two bearings precisely inalinement on account of the strain which is placed upon the shaft by theplug as it grinds the stock, there being a strong -tendency to force theshaft to an oblique position, which in turn tends to force the bearingsout of alinement. It also often happens that the driving-belt for thepulley must be carried up through the floor below, and this necessitatesthe cutting of the base, which, aside from often being difficult toaccomplish, weakens it, so that the bearings may be more easily thrownout of line. This construction also occupies considerable floor-space,which is often very valuable.

The objects of our invention are to obviate the difficulties above notedand to produce a machine of the above named character in which thepulley is held from lateral movement when the shaft is adjusted andwhich is much shorter than engines of this character now in use. Weaccomplish this object by providing a combined thrust and journalbearing at the small end of the shell, which is secured to a solidcasting, the latter being in turh bolted to the end of the shell, and bysplining the driving-pulley onto the shaft and journaling the pulley insaid bearing so that it is held from 'lateral` movement. We furtherprovide a construction of pulley which causes the driving force which isapplied to the face of the pulleyl to be applied directly opposite thebearing, so that there will be practically no tendency to cause theshaft to run unevenly, and thus throw the grinding-plug out of thecentral position which it should constantly assume in order to grind thepulp evenly. We not only shorten the engine by omitting the secondbearing for the pulley,

but we further shorten it by providing a chamber in the large end of theshell, which extends into the adjacent end of the plug and provides aspace within the shell into which the adjustable bearing of the enginemay be moved when the plug needs readjustment.

Fora more complete understanding of our invention reference is made tothe accompanying drawings, in which- Figure l is a side elevationshowing a Jordan engine constructed according to our invention.V Fig. 2is a horizontal cross-section thereof. Fig. 3 is a vertical centralcross-section of the pulley andshaft on an enlarged scale. Fig. 4 is anenlarged cross-section on line .fr a; of Fig. l. Fig. 'illustrates amodification.

As shown in the drawings, the shell l is supported at each end bystandards A and B, the standards A extending from theunder side of asand-boXC, which is directly below the inlet-pipe D.- The shell isprovided with the usual conical grinding-plug 2, said shell and plughaving the usual coacting knives E. A shaft 3 passes through said casingand has the plug firmly secured thereto. A stuffingboX 4 is arranged inthe small end of said shell, and the shaft 3 passes therethrough. Ase-mioylindrical support 5 is bolted to the small end of the shell, anda journal-box 6 is secured in the outer end thereof. The hub 7 of apulley is splined onto the shaft 3 by the feathers S, and said hub 7 isprovided with a projecting end portion 7 which extends IOO ' hub, sothat aside from the fact that said sleeve 9 may be heated and removedwhen worn it is practically integral with said hub. Said sleeve 9 is'provided with a series of circumferential tapering ribs 9, which engagecorresponding grooves in the Babbitt metal 6 of the journal-box 6. Thearms 10 of the pulley extend obliquely from the hub 7 and are connectedto the rim 11 opposite the middle of the journal-box 6. Said arms mayobviously be made in the form of a continuous web. With thisconstruction the shaft will be free to slide within the pulley to permitadjustmentofthegrindi'ng-plug; butthepulleycannot move laterally withrespect to the journal, it being held from such movement by the ribs 9.

Any other suitable form of combined thrust and journal bearing orbearing in which the pulley may be journaled and which is adapted tohold the pulley from lateral movement may be substituted for that abovedescribedas, for instance, the form of roller-bearing shown in Fig. 5,in which the projecting portion 7" of the pulley-hub is provided with asingle groove or chamber, in which a series of rolls R are located, thejournal-box 6 being also provided with a corresponding groove or`chamber to receive the rolls, so that said rolls are located partly inthe hub and partly in the bearing, and thus hold the pulley from lateralmovement. We prefer the tapered rib-bearing, however, as the conicalsides thereof tend to hold the plug in or direct it to the centralposition with respect to the shell.

The arms of the pulley extend obliquely to such a position that thecenter of the rim of the pulley comes about midway of the journal 6, sothat the pull of the belt on the pulley will be brought against thejournal evenly throughout its length and there will be less tendency totwist the pulley to an oblique position than if its rim were at one sideof the journal. This arrangement of the pulley-face prevents theentrance of dust and other foreign substance into the bearing.

The larger end of the conical plug is provided with a conical recess 12,which extends about one-third of the distance to the small end thereof.The walls 2 of the plug which surround this recess are preferably madesolid,and a centrally-arranged annular shoulder 2" is castintegraltherewith and is tightly connected to said shaft, thereby closing theend of the recess 12. A head 13 is bolted to the end of the casing 1,tightly closing the same, and said head is provided with a frustoconicalportion 14, which extends into the recess l2 of the plug and is providedwith a stuiing-box 15 at its innerend, through which shaft 3 passes.vThe head 18 is also provided with segmental-shaped guideways 16, havingstrengthening-ribs 16', in which the journalbox 17 is slidably supportedand held against 16, said arms engaging the side of the boxes.

on opposite sides of the ribs 17', so that the box 17 is firmly held inalinement. The adjacent end of the shaft 3 is journaled in the box 17and is provided with a series of ribs 3', which engage correspondinggrooves in the babbitt 17 of the box 17, said shaft terminating at theouter end of the box. A'hand-wh'eel 18 is swiveled in a bridge-piece 19at the outer end of the guideway 16 and is provided with a screw 20,which is threaded in a nut 21, the latter being bolted securely to theouter end of the journal-box 17. The adjacent end of the shaft is boredout or made hollow for a distance substantially equal to the distancewhich the plug will need t'o be adjusted toward the small end of theshell to take up wear. The diameter of this bore is greater than that ofscrew 20, so that the shaft may rotate freely irrespective of the screw.When it is desired to move the plug toward the small end of the casingto bring the worn blades of the casing and plug closer together, thehandwheel 1S is turned to the left, forcing the box 17, and with it theshaft and plug, inwardly. The parts are so arranged that when the bladesare worn down as far as possible the journal-box 18 will have been movednearly to the stuffing-box 15. Any tendency which the pulp may have tocollect in the chamber 12 between the walls 2 and the inwardlyprojectinghead 14 will be overcome by the centrifugal force generated by therotating plug, which will constantly act to throw the pulp up theinclined outer end walls thereof.

By supporting the bearings at each end of the shell directly from theshell itself instead of upon independent standards We are enabled toaline the bearings much more perfectly than if they were supported byindependent standards, as has previously been the custom.

In the term combined thrustand journal bearing as used in thespecication and claims we intend to include any form of bearing whichwill permit rotation of the part journaled and hold the same fromlongitudinal movement with respect to the bearing.

While we have shown a preferred form of ourA invention, yet variouschanges may be lnade therein without departing from its spirit.

Having described our invention, what we claim'as new, and desire tosecure by Letters Patent of the United States, is as follows:

1. A machine of the character described comprising a shell, alongitudinally-adjustable grinding-shaft arranged therein, adriving-pulley which is slidably connected with said shaft, but held toturn therewith, a stationary bearing within which said shaft rotates,and a swiveled connection between said IOO IIO

pulley and bearing for holding said pulley from axial movement in bothdirections, substantially as described.

2. A machine of the character described comprising a shell, alongitudinally-adjustable grinding-shaft arranged therein, a driving-pulley slidably connected thereto but held to turn therewith, astationary bearing within which said shaft rotates, a circumferentialrib on said pulley which engages a corresponding groove in said bearingand holds said hub from axial movement in both directions, substantiallyas described.

A machine of the character described comprising a shell, alongitudinally-adjustable grinding-shaft arranged therein, adriving-pulley which is slidably connected With said shaft, but held toturn therewith, a stationary bearing, an axially-projecting hub on saidpulley which is j ournaled in said bearing and surrounds said shaft, anda circumferential rib on said hub which engages a corresponding groovein said bearing and holds said hub from axial movement in bothdirections, substantially as described.

Il. A machine of the character described comprising,r a shell, alongitudinally-adjustable grinding-shaft arranged therein, adriving-pulley which is slidably connected with 'said shaft, but held toturn therewith, a stationary bearing within which said vshaft rotates,and a swiveled connection between said pulley and bearing for holdingsaid pulley from axial movement in both directions, said pulley havingarms which extend obliquely from the hub and having its rim encirclingsaid bearing, substantially as described.

5. A refining-engine comprising a shell, a plug therein, a shaft towhich said plug is rigidly attached, a driving-pulley having its axis inalinement with the axis of said shaft, the hub of said pulley beingslidably connected with said shaft, but held to turn therewith, astationary bearing in which the hub of said pulley is journaled, saidbearing being adapted to permit rotation of said pulley therein, whileholding the same against lateral movement in either direction, armswhich extend obliquely from said hub, a rim which is secured to theouter ends thereof and is arranged with its facel opposite said bearing,and means for adjusting said shaft longitudinally, substantially asdescribed.

6. A machine of the character described comprising a suitably-supportedshell, a longitudinally-adjustable grinding-shaft partly arranged insaid shell, a bearing-support rigidly connected to said shell, a bearingsecured to said support and within which said shaft rotates, adriving-pulley slidably connected with said shaft but held to turntherewith, and a swiveled connection between said pulley and shellholding said pulley from axial movement in both directions,substantially as described.

7. A rening-engine comprising a shell, a plug therein, a shaft to whichsaid plug is rigidly attached, a driving-pulley having its axis inalinement with the axis of said shaft, the hub of said pulley beingslidably connected with said shaft, but held to turn therewith, abearing portion which is rigid with i said hub and projects laterallytherefrom, a

rigid support which extends longitudinally conical-shaped plug which islocated therein,

an axially-arranged shaft to which said plug is secured, said plug beingprovided with a recess which extends inwardly from its base end, a headwhich is secured to the adjacent end of said shell and extendsinto saidplugrecess, thereby forming an external recess which extends toward theapex end of the plug, and a bearing for said shaft adjustable in saidexternal recess, substantially as described.

9. A refining-engine comprising a shell, a conical-shaped plug which islocated therein, an axially-arranged shaft to which said plug issecured, said plug being provided with a recess which extends inwardlyfrom its base end, a head which is secured to the adjacent end of saidshell and extends into said plugrecess, thereby forming an externalrecess which extends toward the apex end of the plug, a combined thrustand journal bearing in which said shaft is journaled, said bearing beingadapted and arranged to be adjusted and held in said external recess,and means for moving said bearing toward the shell, substantially asdescribed.

l0. A machine of the character described comprising alongitudinally-adjustable grinding-shaft having an axial bore in oneend, an adjustable thrust-bearing in which the bored end' of said shaftis journaled, and an adjusting-screw for said bearing which ispartlyarranged in the bore of said shaft, substantially as described.

1l. A refining-engine comprising ashell, a grinding means, anda shaftforoperating the same, means for adjusting said shaft longitudinally,comprising an adjustable combined thrust and journal bearing in whichone end of said shaft is journaled, aswiveled adjusting-screw, athreaded connection between said bearing and screw, the journaled endportion of said shaft being axially bored and said adjusting-screw beingpartly located therein, the diameter of said bore being sufficient topermit said shaft to rotate independently of said screw, substantiallyas described.

12. A refining-engine comprising a shell, a conical-shaped plug which islocated therein, an axially-arranged shaft to which said plug IOO IIG

is secured, said plug being provided with a recess which extendsinwardly from its base end, a head which is secured to the adjacent endof said shell, and extends inwardly into lsaid recess thereby forming anexternal recess which extends toward the apex end of the plug, alongitudinally-extending bearingsupport which is rigidly secured to saidhead and is provided with guideways which extend into said recess, acombined thrust and journal bearing which is slidably supported in saidWays, and in which said shaft is journaled and held from longitudinalmovement, means for adjusting said bearing Within said external recess,and for holding it in its adjusted positions, substantially asdescribed.

13. A rening-engine comprising a shell, a conical-shaped plug which islocated therein, an axially-arranged shaft to which it is secured, saidplug being provided with a conicalshaped recess which extends inwardlyfrom its base end, a head which is secured to the adjacent end of saidshell and is provided with a hollow frusto-conical portion which islocated in said recess, a stuffing-box in the apex end of saidfrusto-conical portion through which said shaft passes, a combinedthrust and journal bearing which is adapted and arranged to beadjustably supported Within said frusto-conical portion, said shaftbeing journaled in said bearing, and means for holding said bearing inits adj usted posi tions, substantially as described.

In testimony whereof we have signed our names 'to this specication inthe presence of two subscribing witnesses.

EDWIN CHURCHILL, JR. HUGH A. HALL.

Vitnesses:

LOUIS H. HARRIMAN, J. L. HUTcHINsoN.

